面向海底仪表、海洋观测与海上控制系统的中功率供电与多路抗噪信号混合水密电缆:4×0.75mm²(约18AWG)电源芯为传感器、灯具或执行器供电,4组独立屏蔽双绞对(4×2×0.2mm²)支持RS-485、CAN与4-20mA差分信号,公共引
| Model number | PDK81301-4*0.75+4*2*0.2+D |
| Specification | 4*0.75+4*2*0.2+D |
| Conductor material | Tinned copper |
| Insulation material | XLPE |
| Sheath material | Thermoplastic Polyurethane (TPU) |
| Sheath outer diameter (mm) | 13.8±0.3mm |
| Sheath color | light blue |
| Temperature range | -40-105℃ |
| Water pressure resistance | 10MPA |
面向海底仪表、海洋观测与海上控制系统的中功率供电与多路抗噪信号混合水密电缆:4×0.75mm²(约18AWG)电源芯为传感器、灯具或执行器供电,4组独立屏蔽双绞对(4×2×0.2mm²)支持RS-485、CAN与4-20mA差分信号,公共引流线(D)兼作总屏蔽接地通道。导体全部镀锡,耐海水与湿热腐蚀;XLPE绝缘耐温至+90℃、介电强度好、吸湿率极低。多层水密带与耐压填充料实现径向与纵向阻水,耐水压10MPa,适用于ROV传感器系缆、海底仪器节点及海上平台监测,结构可定制。
This PDK81301 hybrid watertight cable is specifically designed for subsea instrumentation, oceanographic monitoring, and offshore control systems that require a combination of moderate‑power distribution, multiple noise‑immune signal channels, and a dedicated ground reference – all within a compact water‑blocked envelope. It integrates four 0.75 mm² (approx. AWG 18) power conductors for supplying sensors, lights, or small actuators, and four individually shielded twisted pairs (4×2×0.2 mm²) for differential signals (RS‑485, CAN, 4‑20 mA), plus a common drain wire (D) that provides a convenient grounding path for the overall shield or serves as a dedicated earth conductor. All copper conductors are tinned to ensure superior corrosion resistance in seawater and humid environments. XLPE (Cross‑linked Polyethylene) serves as the primary insulation, offering high thermal stability (up to +90°C), excellent dielectric strength, and extremely low moisture absorption – critical for long‑term underwater reliability. The outer jacket is extruded from TPU (Thermoplastic Polyurethane) , delivering outstanding abrasion, oil, and hydrolysis resistance, as well as flexibility for installation and handling. The cable features a multi‑layer watertight construction with water‑swellable tapes and pressure‑resistant fillers to prevent radial and longitudinal water ingress. It is ideal for ROV sensor tethers, subsea instrument nodes, offshore platform monitoring, and marine renewable energy systems – where reliable power, clean signal transmission, and absolute watertight integrity are essential.
Model number
PDK81301-4*0.75+4*2*0.2+D
Specification
4*0.75+4*2*0.2+D
Conductor material
Tinned copper
Insulation material
XLPE
Sheath material
Thermoplastic Polyurethane (TPU)
Sheath outer diameter (mm)
13.8±0.3mm
Sheath color
light blue
Temperature range
Water pressure resistance
10MPA
Key Features – Tinned Copper Conductors, XLPE Insulation, Shielded Pairs with Common Drain Wire, TPU Sheath
Tinned copper conductors – four 0.75 mm² stranded power cores for efficient low‑to‑medium current delivery (up to 6‑8 A per core); tinning prevents galvanic corrosion.
Four shielded twisted pairs (4×2×0.2 mm²) – each pair is individually wrapped with aluminum foil (100% coverage) for excellent EMI rejection and crosstalk isolation, ideal for differential signaling.
Common drain wire (D) – a single tinned copper drain wire (typically 0.2‑0.3 mm²) runs alongside the pairs, providing a centralized grounding point for shield termination or serving as a separate earth conductor.
XLPE insulation – rated -40°C to +105°C (short‑term up to +120°C); exhibits very low moisture uptake, high dielectric strength, and resistance to seawater, acids, and alkalis – outperforming standard PE in thermal and mechanical durability.
TPU outer sheath – polyurethane jacket provides superior abrasion, cut, tear, and hydrolysis resistance; remains flexible at low temperatures and resists oils, greases, UV, and marine fouling.
Watertight integrity – multi‑layer water‑blocking tapes and compact core filling prevent water migration along the cable, even under hydrostatic pressure.
Ideal For
ROV and AUV tether sections for powering cameras, lights, and sensors with multiple RS‑485/4‑20 mA links and a common ground
Subsea observatories and ocean bottom stations with distributed sensor arrays and shared power bus
Offshore platform structural health monitoring (vibration, strain, temperature) requiring multiple signal channels
Underwater acoustic hydrophone networks with individual shielded pairs and a return path
Marine renewable energy system controls (wave/tidal) with integrated power and signal lines
Any subsea application demanding 4 power cores + 4 shielded signal pairs + common drain wire + watertight performance without tension requirements
Conclusion
This PDK81301 hybrid watertight cable offers a practical, high‑reliability solution for subsea systems that require both power and multiple shielded data lines with a common reference. The combination of tinned copper conductors, XLPE insulation, individually shielded pairs, a common drain wire, and a rugged TPU sheath ensures stable, interference‑free operation under continuous seawater exposure. It is an ideal choice for oceanographic instrumentation, offshore monitoring, and underwater robotics.
